<template>
  <div>
    <table border="1" width="700" style="border-collapse: collapse">
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th>
            <input type="checkbox" v-model="AllChange" /> <span>全选</span>
          </th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
      </thead>

      <ShopRro
        v-for="(item, index) in goodList"
        :key="index"
        :uindex="index"
        :uname="item.name"
        :uprice="item.price"
        :unum="item.num"
        :uchecked="item.checked"
        @change="change"
        @lose="lose"
        @add="add"
        @del="del"
      >
      </ShopRro>

      <tfoot>
        <tr>
          <td>合计:</td>
          <td colspan="5">{{ sum }}</td>
        </tr>
      </tfoot>
    </table>
  </div>
</template>

<script>
import ShopRro from './components/ShopRro.vue'
export default {
  components: {
    ShopRro,
  },
  methods: {
    change(index, fla) {
      // console.log(fla)
      // console.log(index)
      // console.log(this.goodList[index].checked)
      this.goodList[index].checked = !fla
    },
    del(index) {
      this.goodList.splice(index, 1)
    },
    lose(index) {
      console.log(index)
      console.log(this.goodList[index].num--)
    },
    add(index) {
      console.log(index)
      console.log(this.goodList[index].num++)
    },
  },
  computed: {
    sum: function () {
      let total = this.goodList.filter((item) => {
        return item.checked == true
      })
      console.log(total)
      return total.reduce((sum, item) => {
        return sum + item.price * item.num
      }, 0)
    },
    AllChange: {
      set(val) {
        console.log(val)
        return this.goodList.forEach((item) => {
          item.checked = val
        })
      },
      get() {
        return this.goodList.every((item) => {
          return item.checked !== false
        })
      },
    },
  },
  data() {
    return {
      goodList: [
        {
          name: '诸葛亮',
          price: 1000,
          num: 1,
          checked: false,
        },
        {
          name: '蔡文姬',
          price: 1500,
          num: 1,
          checked: false,
        },
        {
          name: '妲己',
          price: 2000,
          num: 1,
          checked: false,
        },
        {
          name: '鲁班',
          price: 2200,
          num: 1,
          checked: false,
        },
      ],
    }
  },
}
</script>

<style></style>
